Airtac SAID40 Double Rod Cylinder SAID40AX270
The AirTAC Airtac SAID40 Double Rod Cylinder SAID40AX270 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø40mm bore and 270mm stroke, G1/4 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ40 mm
- Stroke270 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable, 30 mm
About the Airtac SAID40 Double Rod Cylinder SAID40AX270
The AirTAC SAID40X270 is a double-acting, double-rod ISO 15552 profile cylinder featuring a 40mm bore and 270mm stroke. Because a rod exits both end covers, the annulus area is identical on extend and retract, yielding an equal 528N of force in each direction at 0.5MPa. The G1/4 port and 30mm adjustable air cushions at both ends ensure stable operation across the 30-800mm/s speed range.
This specific configuration uses SUS420J2 stainless steel rods (material code A) for superior corrosion resistance compared to standard carbon steel. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting. Note that the through-rod design extends past the rear cover, requiring additional clearance to mount a secondary cam or position flag.
Airtac SAID40 Double Rod Cylinder SAID40AX270 Technical Specifications
| Model | Airtac SAID40 Double Rod Cylinder SAID40AX270 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø40 mm |
| Stroke | 270 mm |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAID40 Double Rod Cylinder SAID40AX270
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×270 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAID40 Double Rod Cylinder SAID40AX270 Is Used
Anti-Rotation Slides
The twin rods provide inherent torsional resistance, keeping guided slides perfectly aligned without the complex external bearings a single-rod cylinder would require.
Symmetric-Force Transfer
Delivers an identical 528N push and pull force at 0.5MPa, ensuring consistent cycle times and balanced pressure for parts transfer between two stations.
Rear-Cam Actuation
The protruding rear rod end can independently drive a secondary mechanism or mount a cam, sequencing a secondary action from the same pneumatic input.
Is the Airtac SAID40 Double Rod Cylinder SAID40AX270 the Right Cylinder?
Select this 40mm bore when an application requires symmetric force and speed, stepping up from a 32mm bore (345N both ways) but avoiding the larger footprint of a 50mm bore (825N). A double-rod design is chosen over a single-rod SAI when the load needs dual-side guidance to prevent rotation, or when a rear-mounted flag is needed to trigger external sensors. The mounting accessory set is limited to Basic, FA, LB, TC, FTC, TCM1, and TCM2, omitting the FB and CA styles found on single-rod variants.
With a 270mm stroke, the unsupported piston rod is subject to bending stress under heavy lateral loads; utilize an external guide rail to prevent premature rod-bearing wear. This cylinder is dimensionally interchangeable per ISO 15552, acting as a drop-in replacement for other standard double-rod profile cylinders. Remember that the adjustable cushions only decelerate the piston near stroke end; this plain cylinder does not hold a load if air pressure is lost, requiring an external rod lock or a SAIL/BSAID variant for position holding.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAID40 Double Rod Cylinder SAID40AX270 FAQ
Because the double-rod design subtracts the rod area from both sides of the piston, the push and pull forces are equal. It generates 528N at 0.5MPa, 739N at 0.7MPa, and 950N at 0.9MPa in both directions.
Yes, it is a profile cylinder dimensionally interchangeable per ISO 15552, but the double-rod design only supports the Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounting styles. It does not accommodate FB, CA, CB, or CR mounts.
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